CSES - Datatähti 2025 alku

CSES - Datatähti 2025 alku - Results

Submission details
Task:	Robotti
Sender:	osmukka
Submission time:	2024-11-06 10:47:56 +0200
Language:	C
Status:	READY
Result:	0

Feedback
group	verdict	score
#1	RUNTIME ERROR	0
#2	RUNTIME ERROR	0

Test results
test	verdict	time	group
#1	RUNTIME ERROR	0.04 s	1, 2	details
#2	RUNTIME ERROR	0.04 s	1, 2	details
#3	RUNTIME ERROR	0.04 s	1, 2	details
#4	RUNTIME ERROR	0.04 s	1, 2	details
#5	RUNTIME ERROR	0.00 s	1, 2	details
#6	RUNTIME ERROR	0.00 s	1, 2	details
#7	RUNTIME ERROR	0.00 s	1, 2	details
#8	RUNTIME ERROR	0.00 s	1, 2	details
#9	RUNTIME ERROR	0.00 s	1, 2	details
#10	RUNTIME ERROR	0.00 s	1, 2	details
#11	RUNTIME ERROR	0.00 s	1, 2	details
#12	RUNTIME ERROR	0.00 s	2	details
#13	RUNTIME ERROR	0.00 s	2	details
#14	RUNTIME ERROR	0.00 s	2	details
#15	RUNTIME ERROR	0.00 s	2	details
#16	RUNTIME ERROR	0.00 s	2	details
#17	RUNTIME ERROR	0.00 s	2	details
#18	RUNTIME ERROR	0.00 s	2	details
#19	RUNTIME ERROR	0.01 s	2	details
#20	RUNTIME ERROR	0.00 s	2	details
#21	RUNTIME ERROR	0.00 s	2	details
#22	RUNTIME ERROR	0.00 s	2	details
#23	RUNTIME ERROR	0.00 s	2	details
#24	RUNTIME ERROR	0.00 s	2	details

Compiler report

input/code.c: In function 'main':
input/code.c:48:5: warning: ignoring return value of 'read' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     read(STDIN_FILENO, &rooms, 1);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Code

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
 
int distance_left(char* array, int robot_index)
{
 
    for(int i = robot_index-1; i >= 0; i--)
    {
        if(array[i] == '*')
        {
            return robot_index - i;
        }
    }
    return -1;
}
 
 
int distance_right(char* array, int robot_index, int array_len)
{
    for(int i = array_len-robot_index-1; i < array_len; i--)
    {
        if(array[i] == '*')
        {
            return i - robot_index;
        }
    }
    return -1;
}
 
int main()
{
    char ch;
    int number_index = 0;
    char amount_str[7];
    int amount = 0;
 
    while(read(STDIN_FILENO, &ch, 1) > 0)
    {
        amount_str[number_index] = ch;
        number_index++;
    }
    amount_str[number_index] = 0;
    amount = atoi(amount_str);
 
    char* rooms = malloc(amount);
    read(STDIN_FILENO, &rooms, 1);
 
    int robot_index = 0;
    int steps = 0;
    int coins = 0;
 
    for(int i = 0; i < amount; i++)
    {
        if(rooms[i] == 'R')
        {
            robot_index = i;
            printf("here");
            break;
        }
    }
 
    int d_left = distance_left(rooms, robot_index);
    int d_right = distance_right(rooms, robot_index, amount);
 
    while(d_left != d_right)
    {
        if(d_left == 0)
        {
            d_left = distance_left(rooms, robot_index);
        }
        else if(d_right == 0)
        {
            d_right = distance_right(rooms, robot_index, amount);
        }
 
        if(d_left < d_right)
        {
            rooms[robot_index] = '.';
            robot_index--;
            rooms[robot_index] = 'R';
            steps += d_left;
 
            d_right += d_left;
            coins++;
            d_left = 0;
        }
        else if(d_right < d_left)
        {
            rooms[robot_index] = '.';
            robot_index++;
            rooms[robot_index] = 'R';
 
            steps += d_right;
            coins++;
            d_right = 0;
        }
        else
        {
            break;
        }
    }
 
    printf("%d %d", steps, coins);
    return 0;
}

Test details

Test 1

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1 R` view save

correct output
`0 0` view save

user output
(empty)

Test 2

Group: 1, 2

Verdict: RUNTIME ERROR

input
`10 ...R......` view save

correct output
`0 0` view save

user output
(empty)

Test 3

Group: 1, 2

Verdict: RUNTIME ERROR

input
`10 .R...*` view save

correct output
`12 5` view save

user output
(empty)

Test 4

Group: 1, 2

Verdict: RUNTIME ERROR

input
`10 *R****` view save

correct output
`0 0` view save

user output
(empty)

Test 5

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1000 R................................` view save

correct output
`947 9` view save

user output
(empty)

Test 6

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1000 .................................` view save

correct output
`886 9` view save

user output
(empty)

Test 7

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1000 .........................` view save

correct output
`1287 400` view save

user output
(empty)

Test 8

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1000 **********.***************...` view save

correct output
`0 0` view save

user output
(empty)

Test 9

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1000 ******************************...` view save

correct output
`0 0` view save

user output
(empty)

Test 10

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1000 R*****************************...` view save

correct output
`999 999` view save

user output
(empty)

Test 11

Group: 1, 2

Verdict: RUNTIME ERROR

input
`1000 ******************************...` view save

correct output
`999 999` view save

user output
(empty)

Test 12

Group: 2

Verdict: RUNTIME ERROR

input
`10000 .......*...................*...` view save

correct output
`10971 999` view save

user output
(empty)

Test 13

Group: 2

Verdict: RUNTIME ERROR

input
`10000 ...........................` view save

correct output
`9999 999` view save

user output
(empty)

Test 14

Group: 2

Verdict: RUNTIME ERROR

input
`10000 ...............*.....` view save

correct output
`18766 5000` view save

user output
(empty)

Test 15

Group: 2

Verdict: RUNTIME ERROR

input
`10000 R*****************************...` view save

correct output
`9999 9999` view save

user output
(empty)

Test 16

Group: 2

Verdict: RUNTIME ERROR

input
`10000 ******************************...` view save

correct output
`9999 9999` view save

user output
(empty)

Test 17

Group: 2

Verdict: RUNTIME ERROR

input
`200000 .................................` view save

correct output
`0 0` view save

user output
(empty)

Test 18

Group: 2

Verdict: RUNTIME ERROR

input
`200000 .................................` view save

correct output
`299934 10000` view save

user output
(empty)

Test 19

Group: 2

Verdict: RUNTIME ERROR

input
`200000 ............*...*....` view save

correct output
`299998 100000` view save

user output
(empty)

Test 20

Group: 2

Verdict: RUNTIME ERROR

input
`200000 ******************************...` view save

correct output
`0 0` view save

user output
(empty)

Test 21

Group: 2

Verdict: RUNTIME ERROR

input
`200000 R................................` view save

correct output
`133765 3` view save

user output
(empty)

Test 22

Group: 2

Verdict: RUNTIME ERROR

input
`200000 R................................` view save

correct output
`199982 5000` view save

user output
(empty)

Test 23

Group: 2

Verdict: RUNTIME ERROR

input
`200000 R*****************************...` view save

correct output
`199999 199999` view save

user output
(empty)

Test 24

Group: 2

Verdict: RUNTIME ERROR

input
`200000 ******************************...` view save

correct output
`199999 199999` view save

user output
(empty)

Datatähti 2025 alku

Robotti

Compiler report

Code

Test details

Test 1

Test 2

Test 3

Test 4

Test 5

Test 6

Test 7

Test 8

Test 9

Test 10

Test 11

Test 12

Test 13

Test 14

Test 15

Test 16

Test 17

Test 18

Test 19

Test 20

Test 21

Test 22

Test 23

Test 24

Tasks

Submissions (osmukka)